Insulated oak wall



Jungs, 1941. D, BONSALL Re. 211,816

INSULATED CAR WALL Original Filed June l2, 195'? ll ,si w, I 4a ReissuedJune 3, 1941 INSULATED UAR WALL Charles D. Bonsall, `Chicagtnlll.,assignor, by

mesne assignments, to Standard Railway Equipment Manufacturing Company,a corporation of Delaware Original No. 2,117,397, dated'May 17,1938,Serial No. 147,969, June "12, 1937. Application for reissue May 13,1940, Serial No. 334,985

19 Claims.

The invention relates to a wall which is insulated to prevent orv retardtransfer of heat through it from one side to the other and is especiallyadaptable for use in a wall, roof, floor or door for a refrigerator caror truck which is Vused to transport perishable commodities.

One of the objects of the invention is to provide a wall of spacedapartl sheets, one or both of which is metallic, with stiflenersyconnecting such sheetsso that the sheetswill cooperate to form a verystrong Istructure to resist stresses against either side of the wallkand to provide an insulating wall by putting insulating material betweenthe sheets, and as the. insulating materials now in general use arecombustible, another object of the invention is to provide stiffeners ofsuch construction that a sheet may be welded. to

Y'them without igniting the insulating material.

l A stillvfurther object is to provide means to insulate the stiilenersso` that heat will not be conductedby them through the wall.

. Another object is to associate and arrange suc insulating means sothat it cooperates with the elements forming the stileners to providehollow spaces to prevent the heat of welding from igniting theinsulating material between the sheets, and a further object is toinsulate that portion of the wall occupied by the hollow spaces byfilling vsuch spaces with non-combustible insulating material.

Another object is to provide a waterproof structure by connecting theassociatedy partsv of the wall together so as to prevent moisturefromcontacting the insulating material and reducingv its insulatingefficiency.

Another object is t-o provide a metallicsheet wall having a smoothinterior or .exteriory surface (or .both if desired) made out of. atmetallic sheets.

. In the drawing: f

Fig. 1 shows a typical application offmy improved wall used as the floorof ar railway refrigerator car.

Fig. 2 shows an enlarged cross section ofthe metallic. sheets andstiiener shown in Fig. 1.

Figs. 3-8` inclusive show modified forms of stieners which may -be usedbetween metallic sheets to` accomplish the objects ofy the invention. f

The drawing shows the usual parts of the car, such-as side sill I; sidewall sheathin'g; side wall lining 3; side wall insulation 4 and sidewall framing 5. I y .y

The form of `my wall or y,floor shown in,Figs.;1

and 2 comprises an upper metallic sheet] and ay lower metallic sheet 8spaced therefrom and substantially parallel thereto, insulating material9 between said, sheets and an insulated stiffener Ill connecting thesheets. The stiffener comprises two. metallic members, each of saidmembers comprising anouter Iiange I3, an inner flange I4 and a web I5connecting the flanges. The insulating fabric or other insulatingmaterial I6 is positioned between the inner flanges I4 of the two.members and is preferably secured thereto by the rivet I'I. Theinsulating fabric is formed with flanges il and 2|, which fiangescooperate with the webs I5 of the members to provide hollow spaces 22and 23. The metallic sheets 'I and 8 kare secured to the metallicmembers, and one or both of the sheets "I--B being welded to the outerflanges I3; the spaces 22 and 23 preventing the heat of the rweldingfrom igniting the insulating material 9. When two upper sheets l`-'| ortwo lower sheets 8 6 `or two upper sheets and two vlower sheets areused, they may be joined by the welding material 24 which secures bothof said sheets to the outer flange I3 of the member.

,n The insulating fabric IE is made of some porous material which may bemoulded in any desired shape, usually when wet, but which has suicientstillness, when dry, to maintain its form. A piece of any materialhaving insulating qualities and rigidity adequate to function in themanner disclosed may be used in place of the fabric.

If desired the spaces 22 and 23 may be filled 'with 'someynon-combustible material, such as asbestos. c

In the modification shown in Fig. 3 a fabric 30 is made of one flatpieceof material extending between the upper l and lower 8 metallicsheets andv the members 3I-32 are secured on opposite sides of' thefabric, preferably by the rivet 33.

` Each member is provided with an inner flange 34,

an outer flange 35 and a web36'to form the space 31. The metallic sheets'I-B are secured to the members :il-32, one or both of the sheets l-8being secured by welding (3l) -to the outer anges -In the modificationshown in Fig. 4 the fabric 40 is one flat piece of material extendingdiagonally' between the upper l and lower 8 metallic sheets. Themetallic members are positioned on opposite Vsides of the fabric andsecured thereto and to each other, preferably by the rivet 4I, and eachmember is provided with a web 42 and an'ge 43 to cooperate with lthefabrlc'to form the spaces 44vand 4,5. r'he upper and lower sheets aresecured' to the ,metallic members, one or both of,

metallic sheet is Welded and a portion spaced from a part of the fabrictoform Walls at least partially encasing hollow spaces positionedadjacent the welds to prevent the heat of welding from igniting theinsulation.

8. An insulating wall comprising spaced apart metallic sheets,combustible insulatingmaterial between said sheets and an insulatedstifener connecting said sheets, said stiffener comp-rising a piece ofstiff insulating fabric extending between said sheets, a metallic memberon each side of said fabric, and means to secure both of said members tosaid fabric, each of said members having a dat part to which theadjacent metallic sheet is welded an-d a portion spaced from a part ofthe fabric to form walls at least partially encasing hollow spacespositioned adjacent the Welds to prevent the heat of welding fromigniting the insulation, each of said members provided with a lip tohold the fabric in place.

9. An insulated wall comprising spaced apart metallic sheets, insulatingmaterial between said sheets and an insulating stifener connecting saidsheets, said stiifener comprising a member secured to one of saidsheets, a metallic member welded to the other of said sheets, and aninsulating piece interposed between said members and having a partspaced from a portion of said metallic member to form walls at leastpartially encasing an air space contiguous to the weld to prevent heatof the welding from igniting said insulating material.

10. An insulated wall comprising a sheet, a pair of substantiallycoplanar metallic sheets in spaced relation to the iirst mentioned sheetto form a space therebetween, insulating material in said space and aninsulating stiffener in said space comprising a member secured to thefirst mentioned sheet, a metallic member, and an insulating pieceinterposed between said members, said coplanar sheets being welded tosaid metallic member, said insulating piece having a part spaced from aportion of said metallic member to form Walls at least partiallyencasing an air space contiguous to the welding to prevent heat of, thewelding from igniting said insulating material. f

11. An insulated wall comprising a sheet, a pair of substantiallycoplanar metallic sheets in spaced relation to the rst mentioned sheetto form a space therebetween, insulating material 1n said space and aninsulating stifiener in said space comprising a member secured to thefirst mentioned sheet, a metallic member, and an insulating p-ieceinterposed between said members, said coplanar sheets being welded to aportion of said metallic member, said insulating piece having a concavepart at least partially encasing said metallic member and disposed inspaced relation to said portion to prevent heat of the welding fromigniting said insulating material.

l2. An insulated wall comprising a sheet, a metallic sheet disposed inspaced relation to the first mentioned sheet, insulating materialbetween said sheets, a stiffener secured to said iirst mentioned sheetand extending substantially to said metallic sheet, said stiffenerincluding an insulating piece having a depressed part disposed in spacedrelation to a portion of said metallic `sheet to form wallssubstantially enclosing an air space, a metallic member disposed withinsaid air space and forming a part of said stifener, and means to weldsaid metallic sheet to said metallic member.

13, An insulated Wall comprising a sheet, a

metallic sheet disposed in spaced relation to the iirst. mentionedsheet, insulating material between said sheets, a stiffener secured tosaid iirst mentioned sheet and extending substantially to said metallicsheet, said stiffener including insulating means to retard flow of heatthrough the stiifener from one to the other of said sheets, said meanshaving a depressed part spaced from a portion of said metallic sheet toform walls at least partially encasing an air space, a metallic memberdisposed within said air space and forming a part of said stiffener, andmeans to Weld said metallic sheet to said metallic member.

14. An insulated Wall comprising a sheet, a metallic sheet disposed inspaced relation to the rst mentioned sheet, insulating material betweensaid sheets and an insulating stifener in said space comprising a membersecured to the iirst mentioned sheet, a metallic member and aninsulating piece interposed between said members, said metallic sheetbeing welded to said metallic member, said insulating piece having aconcave part which forms a wall at least partially enclosing a spaceencasing said metallic member to prevent heat of the welding fromigniting said insulating material.

15. An insulated wall comprising a sheet, a pair of substantiallycoplanar metallic sheets disposed in spaced relation to the firstmentioned sheet to form a space therebetween, insulating material insaid space, a stiiiener disposed in said space and secured to the iirstmentioned sheet, means to secure said metallic sheets to saidstifi'ener, and means to retard flow of heat through said stiienerbetween said sheet and said metallic sheets, said insulating meanshaving a part spaced from the adjacent marginal portions of saidmetallic sheets to form Walls at least partially encasing an air space,said adjacent edges being welded together, whereby the air spaceprotects the insulating material from the heat of Welding.

16. An insulated wall comprising a sheet, a metallic sheet spacedtherefrom, insulating material between said sheets and an insulatingstiffener connecting said sheets, said stiffener comprising a membersecured to said first mentioned sheet, a metallic member having aportion thereof welded to said metallic sheet, and means to retard heattransfer between said members, said means having a part spaced from saidportion and forming a wall structure which at least partially encases aspace positioned adjacent to the Weld to prevent heat of the Weldingfrom igniting said insulating material.

17. An insulated Wall comprising a sheet, a metallic sheet disposed inspaced relation to the iirst mentioned sheet to form a spacetherebetween, insulating material in said space, and a stiffenerdisposed in said space and secured to said first mentioned sheet, saidstiffener including a metallic member and means to retard heat transferbetween said metallic member and said first mentioned sheet, saidmetallic sheets being welded to said metallic member, said means havinga part spaced from the weld to form a Wall structure at least partiallyencasing an air space contiguous to the Welding to protect saidinsulating material from the heat of welding.

18. An insulated wall comprising a sheet, a pair of substantiallycoplanar metallic sheets disposed in spaced relation to the firstmentioned sheet to form a space therebetween, insulating material insaid space, and a stiiener disposed in said space and secured to saidfirst mentioned metallic member and said 'rst rmentionedfsheet,saidmetallic sheets being Welded to vsaid:metallic member, said meanshaving aipartaspaceri from the weld to form a wall structureratleast-partially encasing an air space .contigueus to the Welding toprotect the insulating material from the heat of Welding.

'19. rAn insulated Wall comprising .,asheet, :a metallic sheet disposedin spacedxrelation-:tothe rst 'mentioned sheet to form lfa '.spacethere- `eetween, insulating material `in :said space, :and

:ansie sheet, said stiiener including :a imetailicimember and means toretard heat :transfer ibe'tweensaid faxstiffener .disposed.z'insad-space and secured Lto :said :rst'menticn'ed sheet, fsadstiffener in- 1eludingxa. Imetallic zmember, said metallic sheet beingzWelded t'o said metallic member, said stiffener also including:insulating means interposed Sbetweenfsaid `sheet-and said metallicsheet and ihavngzapart spaced lfrom the Weld to vform a Wall.atileastfpartially encasng an air space con- Itiglious the'Welding,thereby preventing heat -of the Welding :from igniting vsaidinsulating material.

` CHARLES D. BONSALL.

